one, urban environments are used to the advantage of the suspect. less options they have to runaround, better it is and also for public safety. also, during the initial car chase, the brothers showed an ability to bring in a hostage and that is at issue also. and we'll take a look at a live picture. what do we have going on? tell me again, control room? what do you want me to go to? okay, elizabeth cohen reports that the fbi is coming out of the suspect's home right now. pretexturaly we have to figure out what that means? elizabeth, can you hear me? what's going on right now? >> i sure can hear you. a dozen fbi agents with rifles just came out of 410 norfolk street, the address of the man they are looking for. they had assault rifles. they did not have anyone with them. they have widened this crime scene area, it was a lot smaller literally five minutes ago. pushed back all the media, pushed back all the residents and really about a half an hour or so ago, evacuating residents, som some coming out with their pajamas. a dozen fbi agents came out of 4